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Other video on demand services like iTunes, YouTube, and Amazon will likely offer a pay-for-download as well (separate to Amazon's Prime streaming site).

The HD digital and DVD option is £13.99, with the DVD arriving on September 3.

For fans who want the Blu-ray experience, the price jumps to £17.99, but the release date is the same.

Sky store describes the plot for Infinity War like this: "The Avengers assemble once more, this time coming together to stop the universe-destroying plans of mighty villain Thanos. Star-studded superhero adventure with Robert Downey Jr, Scarlett Johansson and Josh Brolin."

Once downloaded, the movie is available on four compatible devices, according to Sky Store.